1.什么是喷油提前角从喷油器开始喷油起,至柴油机的活塞到达压缩行程上止点为止的曲轴转角叫做喷油提前角。如果喷油提前角过大,压缩气体的压力和温度都不很高,不能很好地组织燃烧,着火延迟期长,柴油机工作粗暴。如果喷油提前角过小,燃烧过程拉长,造成补燃量增加,功率下降,柴油机过热。因此,每种型号的柴油机都规定了最佳的喷油提前角,投入使用前应据此调整。 1. What is the fuel injection advance angle from the fuel injector began to diesel engine piston reaches the compression stroke until the top dead center of the crank angle is called fuel injection advance. If the fuel injection advance angle is too large, the compressed gas pressure and temperature are not very high, can not be well organized combustion, the ignition delay is long, rough work of the diesel engine. If the fuel injection advance angle is too small, the combustion process elongated, resulting in increased fueling, power down, diesel overheating. Therefore, each type of diesel engine provides the best injection advance angle, put into use should be adjusted accordingly.